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The Alesis ProLinear 820 DSP continues the new standard in near-field monitors that was set by the ProLinear 720 DSP. With the same Alesis’ custom DSP technology, we have designed a speaker with same sound quality and accuracy but with extended bass and greater output. This allows the speaker to be used as a mid-field monitor as well as near-field. As with the 720 DSP, the internal processing allows user flexibility to configure the speaker for almost any application via the front panel control or the included graphical PC application software.
ProLinear 820 DSP Features It Begins with the Drivers Any great speaker design starts with the best drivers and the Alesis’ custom drivers are exceptional. The woofer has a cast frame with an 8” Kevlar-Carbon cone and oversized magnet assembly. The Kevlar-Carbon cone has outstanding stiffness to weight ratio to minimize distortion, extend bass response and provide excellent transient response. The magnet assembly provides high linearity and good efficiency. In the 820 DSP cabinet, the woofer is flat down to 39hz (-3db, anechoically) with harmonic distortion typically below .4% above 50hz. The tweeter is a 28mm silk dome that has a very flat frequency response with a low resonance to reduce harshness. The tweeter is ferro-fluid cooled to provide good power handling and well-behaved response. Distortion is typically below 0.3% over its operating range. The tweeters computer designed waveguide was optimized for nearfield placement but provides excellent imaging in most other placements. Both drivers are shielded and allow the user to place the speakers within a few inches of a CRT. The Cabinet Since the 820 DSP cabinet is larger than the 720 DSP, heavy bracing was included to minimize any cabinet resonances. In addition, a coating of bitumen was applied to the inner walls to further deaden the cabinet. Venting was optimized to eliminate most of the vent noise or “chuffing” that can occur at low bass frequencies. Specifications Input: Nominal input level: +4dBu (-15dBFS). Maximum input level: +20dBu (7.0 Vrms) Input impedance: 10kΩ Output: Sound Pressure Level (SPL): ~113db at 1 meter at max input below clipping. Low Frequency (LF) power: 80 watts RMS, ~120 watts peak. High Frequency (HF) power: 40 watts RMS typical, ~120 watts peak. Frequency response: 50hz – 20kHz +/- 1.5dB. Bass level -3dB @ 39hz typical, Signal To Noise ratio: > 90 dB A-weighted, Analog In to Analog Out, Power Requirements: Input voltage: 100v – 230v Input frequency: 47 – 63 Hz Power consumption: 20 W (idle) 130 W (typical, at maximum volume) Environmental Requirements: Temperature range: 0-40 degrees C. Relative humidity (non-condensing): 30-85%. Cabling Requirements: Mixer to Speaker: Balanced or unbalanced, shielded; XLR or º” TRS connector. Speaker to PC: Standard 9-pin, RS-232 serial cable (male-female). Speaker to Speaker: Standard 9-pin, RS-232 serial cable (male-female). Mechanicals: Size (HxWxD): 17" x 11" x 13.5" (440mm x 280mm x 345mm) Weight: 32lbs (14.6kg) |
